Algodoo

A artillery cannon

Mission:
Try and destroy the two towers further up

Controls:
Semi fire: F
Automatic fire: F (hold)
Brakes: D (toggled)
Drive: left and right arrows
Aim: up and down arrows

Emergency antilagg button: Numpad 1 (destroys the two towers)

Edit:
Used the Shootable Howitzer 3 ammo
Link: http://www.phunland.com/phunbox/details/20887

Edit:
Yes, i know it jams alot try and unjam with drag and numpad 2